Rotary pulp-wood barker and peeling machine.



A. ROBERTS & A. LIB ERT.

ROTARY PULP WOOD BARKER AND FEELING MACHINE.

APPLIOATION FILED APR.28, 1908.

934,464, Patented Sept. 21, 1909.

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ROTARY PULP WOOD BARKER AND FEELING MACHINE.

APPLICATION FILEDAPRJB, 1908.

934,464. Patented Sept. 21, 1909.

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APPLICATION FILED APR. 28, 1908.

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ALEXANDER ROBERTS AND ARTHUR LIBERT, OF GREEN BAY, WISCONSIN.

ROTARY PULlP-WOOD BARKER ANDv JPEEIIIING MACHINE.

Specification of Letters Patent.

Patented Sept. 21,- 1909.

Application filed April 28, 1908. Serial No. 428,720.

To all whom it may concern:

Be it known that we, ALEXANDER RonERTs and ARTHUR LIBERT, citizens of the United States, residing at Green Bay, in the county of Brown and State of Wisconsin, have invented 'a new and useful Improvement in Rotary Pulp-VVood Barkers and Peeling Machines, of which the following is a specification.

This invention relates to a device for removing the bark from logs intended for sulfite millsand wood pulp mills.

This invention relates to a device of this kind in which the'logs to be operated upon are run along a track upon which are mounted diagonally arranged rollers which givea rotary movement to the log as it travels over the rollers and as on side of the log is engaged by a cutter head provided with knives the opposite side portion of the log is engaged by a rotatable spike bumper, whereby the bark is stripped from the log, small knots are removed andthe log is otherwise plafized in proper condition to be sent to the m1 The invention consists in the novel features of construction hereinafter described, pointed out in the claims and shown in the accompanying drawings, in which Figure l'is a plan view of our device. Fig. 2 is a side elevation. Fig. 3 is a longitudinal section through the bumper portion of the device. Fig. 4 is a longitudinal section through the operating parts of the cutter head portion of the device. Fig. 5 is a transverse section taken through an eccentric shaft feed.

Inthese drawings 1 represents a suitable .track upon which we preferably place diagonally arranged feed rollers 2, although other forms of feeding devices can'be arranged upon the track if desired. In .asuitable frame 3 is mounted a shaft 4 on which is a driven pulley 5 and a beveled gear 6. The

which carry gears 17 'which mesh with a beveled gear 18 carried by the lower end of the shaft 11. The space between the two drums 16 is covered by a curved hood 19 carried by the collar 13. A long collar 20 is also mounted upon the sleeve 12 and is. spaced from the collar 13 by a coil spring 21.

The spring 21 allows a limited sliding movement of the collar 13 upon the sleeve 12 and consei' uently permits the drums to yield when they come into engagement with knots or projections upon-the logs; Mounted upon a head 22 is a lever23 which works over a rack bar 24 and this head carries a longitudinally grooved downwardly extending bracket 25 into the groom of which extends an arm 26 carried by the shaft 11. A transverse shaft 27 carries a gear wheel 28 which meshes with a rack bar 29 formed on. the collar 20, and by rotating the shaft 27 by means of a hand wheel '30 the collar 20, arm 26, shaft 11 and parts carried thereby may be moved longitudinally with respect to the long gear 9, thus regulating the depth to Which the spikes of the bumpers will enter the wood, and this movement also allows for using the bumpers with logs of various sizes.

Upon the side of the track 1 opposite the mechanism just described and upon the same base or platform is mounted in suitable bearings a hollow shaftv 31 upon an end of which is cast a knife holdifig head 32 and upon which is fixed a belt wheel 31*. Upon this head 32 are secured suitable" bark cutting knives 33, of any of the usual types. Within the shaft 31 is slidably mounted a shaft 34 Which at its end carries a movable curved knife guard 35 upon the central portion of which are placed small knives 36 for the purpose of trimming ofl small knots and twigs, before the log comes into engagement with the bark cutting knfves 33. The guard 35 is suitably slotted and the extent to which the knives 33 project to said guard is regulated by sliding the shaft 34 in the shaft 31, which sliding movement draws the guard plate 35 toward the head 32 or moves it away from said head. To provide for this sliding movefnent of the shaft 34 we secure to said shaft a bearing 37 which is provided with 'rectangular lugs 38, and 1s looked upon the shaft 34 by nuts 39, it being understood that the shaft 34 rotates freely in the bearing 37 The lugs 38 project into slots.40 formed in 31 is mounted.

eccentrics 41 which eccentrics are Operated by a bifurcated link 42 connected to a suitthe shaft 31 by means of a clutch collar 44:.

It will be obvious that by shifting the .lever 43 the link 42 will shift the eccentrics 41 and a sliding movement will be given to the bearings 37 and shaft 34. The slots are of sufficient size to allow for the'lack of vertical movement on the part of the shaft 18 which is of course held against such movement. by bearings 4L5 in which the shaft A protecting sleeve 25* is carried by the head 22, and theslotted bracket. 25 1s preferably connected directly to said sleeve, thus indirectly connecting the bracket to the head.

Having thus fully described our invention. what we claim as new and desire to se cure by Letters Patent, is

1,. A device of the kind described compris ing a bracket rotatably adjustable, rotatable spiked. drums carried by said bracket, means for rotating the bracket upon its axis, means for sliding said bracket longitudinally, knives rotating in a fixed plane, and arranged opposite said; drums, and rollersfor supporting logs while being operated upon simultaneously by said drums and knives.

2. In a machine of the kind described, a track way, rollers arranged obliquely upon said track Way, said rollers forming a support for logs, spiked drums rotatably mounted above said track way, the said drums being parallel to the track way, and

knives rotating in a fixed plane opposite to 3 the drums and at an angle to said track way,

the plane of said knives forming an acute angle with the rollers first mentioned. a

3. A device of the kind described comprising rotatable and tiltable spiked drums, a set of rotatable knives, an adjustable knife guard, a supplemental set of knives carried by the guard, said knives being .arranged1 opposite to said drums, and means for supporting logs during passage between said knives and drums, said logs having a rotary movement during such passage.

4. A device of the kind described comprising a shaft having a knife head formed thereon, knives carried by said head, a second shaft slidable within the first shaft.

a slotted knife guard carried by the second shaft, slidable bearings in which said shaft is held, lugs carried by said bearings, slotted eccentrics, said lugs fitting in the ececntrics, and means for operating said eccentrics for the purpose of sliding said shaft.

5. A'device of the kind described comprising a rotatable shaft, a collar mounted upon said shaft, brackets carried by the collar, a shaft carried by said brackets, spiked drums mounted upon said last mentioned shaft, gears on said drums, a gear upon the first mentioned shaft meshing with the drum gears, means for rotating the first mentioned shaft, means for sliding said shaft longitudinally, and means for tilting the second mentioned shaft.

ALEXANDER ROBERTS. ARTHUR LIBERT.

lVitnesses:

VVILI AM CLEERMAN, HENRY B. CLEERMAN, .lr. 

